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| chronic obstructive pulmonary disease; chronic obstructive lung disease; chronic obstructive airways disease | |||
| Cold: 10 phrases in 8 subjects |
| Chemistry | 1 |
| Coal | 1 |
| Commerce | 2 |
| General | 1 |
| Information technology | 1 |
| Marketing | 1 |
| Medical | 1 |
| Transport | 2 |
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